I have a big file, and I wanted to copy it to the other machine. (Both runs on Windows 7 x64.)
The network speed is terrible, so it took hours to get even 25gigs copied over. And then, the network died.

Now I would like to continue the transfer, but I used Total Commander. It can overwrite the file and such, but I want to continue. I'd prefer to continue, and keep the already copied portion.

What software can do this?
I've checked Robocopy, TeraCopy and Total Commander. No luck so far.

3 Answers
3

I don't believe that any program exists that can resume a copy started by a different program. To resume a partial transfer you would have to use the same program that started it, assuming it supports that (and it sounds like yours doesn't). With a network that flaky, I would suggest copying it via USB drive. If you don't have a USB drive large enough to fit the entire file, you can break it up using a tool like File Splitter and transfer it a piece at a time. Actually, doing it this way and using two drives (1 to copy from source and 1 to copy to destination, simultaneously) would effectively double your throughput.

"unless the program you were using to copy it supports that (and it sounds like yours doesn't)." – And the question happens to be "what software can do this?"
–
grawityJul 24 '12 at 23:16

True, but it sounds like the OP is asking what program can resume a copy started by Total Commander. Since Total Commander apparently doesn't support it, I don't think there exists anything that could take over that particular copy, so I was suggesting an alternate faster/safer method. Poor wording on my part... I will edit my response.
–
techturtleJul 24 '12 at 23:24

Standard command line tool XCOPY could resume copying files after connection was broken. If you do such tasks from time to time, to create a .cmd file with xcopy command could be acceptable solution. It's much easier than split files and use usb sticks.
Type xcopy /? in command line to check syntaxis.